Family nonuniversal Z′ models with protected flavor-changing interactions

By Alejandro Celis, J. Fuentes-Martín, M. Jung, H. Serodio. 2015

224 citations recorded by the source corpus.

We define a new class of $Z'$ models with neutral flavor-changing interactions at tree level in the down-quark sector. They are related in an exact way to elements of the quark mixing matrix due to an underlying flavored $U(1)'$ gauge symmetry, rendering these models particularly predictive. The same symmetry implies lepton-flavor non-universal couplings, fully determined by the gauge structure of the model. Our models allow to address presently observed deviations from the SM and specific correlations among the new physics contributions to the Wilson coefficients $C_{9,10}^{(\prime) \ell}$ can be tested in $b \to s \ell^+ \ell^-$ transitions. We furthermore predict lepton-universality violations in $Z'$ decays, testable at the LHC.

Subfields: Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/4061550d8f6a1a57866f79fcde04cba3591f892e

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In Nuclear and High Energy Physics

Citations in the corpus

Lepton flavor non-universality in B-meson decays from a U(2) flavor model (2015, background): “Other works [18, 22] considered gauged abelian symmetries that are able to reproduce some features of the CKM matrix (but not the SM quark mass hierarchies).”
Lepton universality violation with lepton flavor conservation in B-meson decays (2015, background): “[72], there is a simple and furthermore predictive explanation: the source of flavor in the NP is the charged lepton Yukawa coupling.”